Research On The Two Time Multiplex Anchor Injection And Reinforcement Technology Of The Gateway

High gas coal mine adopts U+L type ventilation way when gas drainage roadway is generally along the work surface along the groove of a certain distance, in the middle of a certain width of coal pillar, also have in the middle of the working surface.This paper for Shiquan coal mine 30102 gas tail roadway secondary reuse problems are identified as the core of the comprehensive research method, considering the gob Liu Xiang small coal column, solid coal and oblique cross beam structure deformation failure characteristics of surrounding rock and should stress environment proposed by hollow grouting anchor and hollow grouting anchor as the core of bolting and grouting reinforcement reinforcement scheme and its application effect is good.For along the roadway surrounding rock structure. Through in-situ stress measurement and monitoring technology analysis of roadway along gob during mining oblique cross beam of roof stress distribution characteristics and rules in Roadway along gob elastic should stress distribution, plastic strain zone distribution range and advance abutment pressure influence range of the scene, guide bolt grouting reinforcement strength and emphasis, Shiquan coal mine of teacher 30102 of gas tail roadway bolting and grouting reinforcement reinforcement design scheme provides scientific basis.In order to improve the stability of the special structure of surrounding rock in small coal pillar, inclined cross beam and solid coal formation of the main ideas, focus on "the interaction of support and surrounding rock", put forward along the bolting roadway section reinforcement supporting scheme, concrete measures in gob roadway in small coal pillar and solid coal help with the help of long hollow grouting anchor bolt grouting reinforcement technology of "three high", namely high pretightening force, high ash water ratio, high pressure grouting, improve small coal pillar and solid coal integrity and bearing capacity, improve the characteristics of roadway stress control, coal deformation; roof using hollow grouting anchor bolting support, strengthen the contact mechanics of top coal, and hard roof roof, the roof Fissure Grouting closed at the same time, improve the diagonal beam structure integrity and stability, meet the roadway stability in service period requirements.